I did this by paying 30% of my net income (my gross is just over 50K annually) for the last 9 months. During this time I also continued to save 15% of my net for retirement savings. This was also done while my wife was on mat leave (earning about 45% of her salary on EI here in Canada) while she ALSO continued to save 10% of her normal net pay (or about 18% of her EI) no new debt accumulated either.
I know not as frugal as most here, but many friends and co workers said my payments were not sustainable. BOOYA.